Field Emission from Whiskers
Field Emission from Whiskers
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晶须场发射
DOI：
10.1063/1.1701081
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发表时间：
1961
影响因子：
4.4
通讯作者：
R. Gomer
中科院分区：
文献类型：
--
作者：
A. Melmed;R. Gomer
本文介绍了一种在高真空条件下从蒸气中原位生长的晶须获得场发射的方法。几乎可以用任何导电材料制造干净而坚固的发射体，因此可以用于场致发射的物质的范围已经大大扩大。以下的生长动力学和确定晶须的长度和半径的电气方法进行了描述和适用于Au。生长被发现是正指数随时间的推移，这支持的机制，通过在晶须两侧的碰撞原子的扩散，并在生长结束时纳入增长。在这些实验中，生长的停止是扩散限制的。根据末端长度随温度的变化，可以估算出Au在Au表面扩散的活化能为23±5 kcal。一些吸附和氧化实验表明，该方法也可用于这些现象的研究。例如，人们发现...
A method for obtaining field emission from whiskers grown in situ from the vapor under high‐vacuum conditions has been developed and is described. It is possible to fabricate clean and strong emitters from almost any conducting material, so that the range of substances that can be used for field emission has been considerably expanded. Electrical methods for following the growth kinetics and determining whisker length and radius are described and applied to Au. Growth is found to be positively exponential with time, which supports a mechanism of growth by diffusion of impinging atoms over the whisker sides and incorporation at the growing end. Cessation of growth is diffusion limited in these experiments. It was possible to estimate the activation energy for the surface diffusion of Au on Au as 23±5 kcal from the variation of terminal length with temperature. Some adsorption and oxidation experiments indicate that the method can also be used for the study of these phenomena. It was found for instance that...